The open valley trough range provides drainage channels at the roof valleys. These traditional, pre-formed GRP troughs are perfectly safe to use when wanting to collect rainwater runoff. Designed with a greater capacity, they are a lightweight and cost effective alternative to lead. Being manufactured from GRP, the valley troughs have the following benefits;

  • Up to half the cost and time of traditional lead installation
  • Semi-skilled fitting procedure
  • Light in weight and easy to handle
  • 30 year service life guarantee
  • Do not streak or stain
  • No value to the thief
  • Contains recycled glass

Product Codes

HDL 401 and HDL 402

Application of the Open Valley Trough

The HDL 401 and HDL 402 are suitable for tile roofs.  They are for ‘standard’ application compliant with NFRC Technical Bulletin 28.

Find Hambleside Danelaw’s open valleys at a stockist.

Danelaw Open Valley HDL 401 402

Downloads

Open Valley Troughs Datasheet
PDF • 867.31 KB
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Open Tile Valley Troughs Installation Recommendations
PDF • 247.42 KB
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BBA 87 1915 Certificate GRP Flashing - Valley Tiled
PDF • 1.11 MB
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HDL 401 and 402 Drawing
PDF • 208.43 KB
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